Yuan Su can be said to be the foundation of all industrial systems in the Dream world.
Essence Power armor, Essence Power cars, Essence weapons, and even various daily necessities... All conventional industrial systems, as well as alchemy, runes, and craftsman systems, are built upon Yuan Su.
Aina could not imagine how a world without Yuan Su would operate.
Although in that previous vague dream, she had already seen many inconceivable things.
After thinking for a moment, Luo Xi said, "It should be oil."
"Oil?"
Aina did not understand this term exclusive to reality.
"Our world has quite a variety of energy systems, and oil is just one of the more important raw materials."
Luo Xi picked up Aina from the bed, gently placed her on the ground, and said with a smile, "But because there is no Yuan Su, there are no Transcendence-related powers, and the descriptions of such powers exist mostly in myths."